Insulator cap



Siem. 5, 3925,

INSULATOI" CAP April '7,

Patented Sept. 8, 1925..

UNiTED STATES PATENT @PriceL ARTHUR o. AUSTIN, oF BARBERTON, cino Assmives', mz missies Assieiirieiirs, THE Aorazio BRASS COMPANY, or meiisszietii, omo, l1i. oceroim'rioii cis New iiissoiieo ser.,

To all 'whom t may concern.'

Be it known that I, ARTHUR G. AUS'iiN,`e

citizen oi' the United States, residing; et Barberton, in the county of Summit emi' State of Ohio, lieve invented certain new" and useful improvements iii Insulator Caps,

i shell be of improved construction sind op eration. I

Tlie invention is exemplified in tlie coiiiloinstion and aii'ziiigei'iieiit of psi-ts sliowii iii the accoiiipeiiying' drawings and fle-y sci'ibe in the following' zciiczitioii, and it is more particularly pointed out iii the appended claims.

Fig. Ti is e ple-ii view ci mi insulator cap embodying one form of tlie present iiiventicii;

Fig. 2 is a. section on liiie Q-2 ci Fig. l;

Fig, 3 is e. pian View of en insulator cap showing e modified forni ot the invention.;

Fig. Li is e. section on line 4 4: of Fig. 3; Fig. 5 is e. :fragmentary section on line 5-5 of Fig'. 3;

Fig. 6 is :i section similar to 2 and showing another form oi the inventicii; and

Fig. 7 is a section similar to Fig. G, showing e dili'erent iiicili-fication of the invention.

liisulator's are ccinirioiily mede of porceleiser similar materiel heving a relatively high ultimate strength iii cciripression, but.

having comparatively low strength iii ten-- sion. sind sheer. Such insulators are conimanly provide-d with some form of metallic supporting member, suoli es ay metallic cap which Vfits over portieri of the dielectric member.. The (lieieet'ric member is secured within the csp by holding materiel, sucliY as Portland. cement` which tiiensmi tlie loert. ceriie' 'by 'the insulator from the dielectric member to the cap. Asexplaiiiecl iii iiiv prior ippliciti'oii,` Serial Nc. ELAST@ filed August 2, l919,"it"is desirable that lsome means be provided for e'ecting e yielding connection between the insulator ami cap ture conditions. referred tc above, lieve sliown' ver means for securing certain of tlieee 'ci' ranged to provide elasticity -lietit 'Wi that it sfiall yield circiiiiiiereritielly to tlie cap is necessery'to resist the action vwliile retaining sufficient tliiciiiiess tlieicci'.

.member which is cemented within. tr f 4rise te lengeicus stresses, The porti inlorder to provides proper ilistriiiiitioii ,theload transinitte by the securing inseriel.. It is also desirable to provide ,taking cere oi t YLe diiereiiees espere sieri` 'anti contraction of the flielectrics emi iiieteliic iiieiriliersiiiiler changing temperelii my prier implica-iti teristics. ri the invention shown ii present appliciitionthe. oep itself 4is yieii to the forces te which it is siilfiiec" :incl thus prevent subjecting the d'elee., member tc dangerous stresses. f

lt is lesireble that the cap 'slieli yield if@ lootli iii. the direction of the lessi ,to 'wiiiel the insulator isvsubjected ir. order to i? c tribute the load along the csp in tlie ieiigi tudiiiel riiectioii ci the insulator smi vent, dangerous Stresses' 'cii the, Ciieleetric member due to iiiieeiief. coiitrect and. expansion resulting from temperetu, c changes.' Y l A substantiel thickness cf the eil weather when tlie caps ere liii use eii'. to facilitate proper and easy casting the caps are made of cast instel. 'llie tlness must ordinarily De suoli that vthere is' not sui'cieiit elasticity te prever-it den stresses iii tlie dielectric, A, sejo cordiiig to tlie presentinvention provides the desirable elasticity iii its in Figs. l., and 2 ,an insuletcr csp i0 'e provide with e socket iiieiiiioer ll :tor A ceiviiig e supporting piii in 'the usuel inse, ner 'and the interior ci tliecep is pr/civilis witli ,ribs -or projections 'l2 for holding ce mentror other securing 'xiieieriel' therein. The lower edge' ci: he is crimped or corrugated to provide a, rim l"-` wliicli will yieldwlieii subjected tc efliill transmitted Ythereto from 4the dieleeti The rim 13 {livirlciiiiy eseies ci spaced circumferentisiiiy the bestie 1 mit yielding of thei'im in a. ciif'ciiriereiiti direction end tliiispreveiit uiiiie I or the dieieetric' member ivliiclfi iwciilel yi c tile cap 10 spaced'inwerdlyf from? er eic provided with openir e through the Wall ai gements and n' J he employed, s.. ^h slits shown in lon illustrated in Fig. ged one above the eireumierentielly ,d preferably posione another.

'in et en@ is iliusi 'on 'to the slits 3.4;.,

ei the eorruga stillness ot the ily reduced to tions as sliov i 7i l, n1. 5',

corri will he nu i .'igi'.,

ivi tion shown in cap .i is provided "is of slits l?, the ng arranged it 'their ends, divided up into hei'rd when suh 'ual inovei'i'ient, o 4 atively sufficient the eneet et unequal contrae on l einpei-attire ehanlL on oi loud stresses. slots shown in "ll-"g2 ig expansion ot the the :wis ot the in oi. course, jfliunsion. por )rations is the wall 'lO of the y desired nunr i iirio iiions ed or est in. the eap ir l relative to one 1f.. metal eil'eet her of por may lz" un= :lnl :ire pro m 'ier to p' .Y do au espa so :is to pw luce 3 leldio alor and 211 itiuliy olf 'the also he provided with "iniilar o perforations 15 ional periorutions may' t in the iin. lll to still u ling aetiiin. it will he epperent iount ot elasticity oli the cap may d hy the number orf per'toretions and that the perfor ...ons mai; he arranged 'A astieity in any amount of the ons portion of the een may also the proper nnrnfui-th L that the a o lioth iong'itmlinelly ber of openings suitably distributed. Vhile the perforations are illustrated in the drawings as extending entirely through the walls oit the insulators, it will he understood that they may extend only partially through the walls, leaving thin portions to close the o enings, but which are suiiciently reduced in thickness to permit o1" the requisite yielding, action.

claim z- 1. An insulator oep having a plurality of series of perfor-ations in the Wall thereof spaced eireumferentially about said cap and arranged 'in staggered relation relative to one another..

2. A n insulator cap having the wall thereof corrugated 'to 'form rt rim at the edge of said Wall and hariiig perforations extending through said rim to 'rendervsaid rim elastic, the niieterial of said rim .forming a elosed wali surrounding eaeh of said per- 'iterations'.

3. An insulator eap having the Wall thereof leent to :term a eorrugation and having perorations extending through said izorrugation 'from ei w exterior face to the other exterior i'uoe thrreoif so that both ends of said perfo 'ations open on the exterior of said cap.

el. in insulator oep haring 'a Wall thereof lient to forni an outwardly projecting oor-- irrigated flange at the edge thereof and having perforations extending through said 'langge to render said iii fre elastic, said periorations opening at ih r opposite ends on the exterior of said eap und arranged to eut inte the interior ott said, cap, ii'itern'iediate the ends thereof.

5. An insulator cap havingr the wall thereof corrugated to forni e flange at its edge said wall having overlapping perforatior-s therein spaced from the edge thereof, said flange being perforated at spaced points about the circumference of said Cap.

6. An insulator cap having the wall thereo'il corrugated to form a riin at the edge of said wall and having perforations extend ing through said rim to render seid rim elastie, said perforations being spered inwardly from the outer periphery et sani rim and having lboth sinds thereof opening externaldy of said Tini.

7. in insulator'eai') having; a plurality of series of eireiuinerentally spaced openings in the walls thereof, said openings being staggered both eireun'iierentiaily of said oep and in 'the direction transversely to the eireumferenee thereof to permit expansion of said cap eirei'uuferenti:illy and in an axial direction. ,f

In testimony whereof I have si March, A. D. 192i.

' A l't'll-lUl O. AUSTIN.

leo 

